I've had this truck for a few years now and it has always seem to have a louder then stock exhaust.

I've listen to other 4.0's pulling away and mine's definitely louder but not to the point of irritation as I like the sound. Quiet and low sounding till 2000 rpm but above that you can definitely hear it working with the windows down. No engine lights or exhaust leaks, all of the sound is from the tip and it looks like any old big stock long can underneath with 2 cats. Maybe a trd exhaust or blown out muffler? Maybe just how it's supposed to be.